Apparatus for leaching sacchariferous-vegetable slices.



M. PASCHEN.

APPARATUS FOR LEACHING SACCHARIFEROUS VEGETABLE SLICES.

APPLlCATlON FILED SEPT-18, I913.

Patented Apr. 6, 1915.

THE NORRIS PETERS C0 PHOTCVLITHOH WASHINGTON D. c.

UNTTE ST ATE @FFTQE.

MAX PASCHEN, or corrrnn, GERMANY.

APPARATUS FOR LEACHING SAGCHABIFEB-OUS-VEGETABLE SLIGES.

Application filed September 18, 1913.

To all whom it may concern .Be it known that I, MAX PASCHEN, subject ofthe German Emperor, residing at Schillerstrasse 18, Cothen, Anhalt, inthe German Empire, have invented new and useful Improvements inApparatus for Leaching Sacchariferous-Vegetable Slices, of which thefollowing is a specification.

The present invention relates to an apparatus for leachingsacchariferous vegetable slices according to the patent applicationSerial Number 725,750. According to the said application a separatingchamber is interposed between each two leaching chambers in which juiceand slices meet in counter current and are stirred with each other. Intothis intermediate, separating chamber the juice enters at the top andpasses at the bottom into the neXt chamber. Thereby a continuousoperation in counter current is rendered possible, as, on the one hand,the juice is prevented from flowing too rapidly through theapparatus,which would be the case, if the juice could flow through holes in thebottom of the partitions, and, on the other hand the currents of juiceand slices traveling in opposite directions are prevented fromdisturbing each other at their overflowing point from one chamber intothe other, which would necessarily occur, if the same overflow were tobe used for both currents. At the same time the juice and slices will,by these separating chambers, be temporarily separated from each otherso that a better leaching of the slices results, which is still furtherimproved by the juice being forced by this arrangement to travel throughthe mass of slices along a longer oblique path. Furthermore the leachingperiod is essentially abbreviated, a noxious foaming is prevented and agood heat economy is insured owing to the complete exchange of the heat.Furthermore the plant is greatly simplified owing to the absence ofpumps for conveying the liquid from one chamber into the other.

With the apparatus after the older patent the separating chamber isformed by two partitions meeting under an angle, the one of which, whichis directed toward the current of juice is perforated at the top, so asto allow of the liquid passing through and of retaining the slices. Thisarrangement, however, showed the disadvantage that the impurities inthejuice, such aspulp, sand and the like would deposit in front of theSpecification of Letters Patent.

Patented Apr. 6, into.

Serial No. 790,402.

non-perforated lower part of the said partition. This deposit grewcontinuously and gradually reached the upper perforated part so that theperforations became filled and choked, and the passage of the liquid wasobstructed. It also sometimes occurs that the impurities accumulated infront of the partitions, thus within the leaching chamber, were raisedby the agitators and conveyed upward in an undesirable manner togetherwith the slices.

According to the present invention these difiiculties are met by theoverflow for the liquid being covered by means of a roof, be-- neathwhich a suitably wide anti-chamber is provided, in which the impuritiesmay deposit. The roof, at the same time, serves as a kind of chute onwhich the slices can slide, and are more readily than before freed ofjuice and any adhering impurities. A special advantage may, further, beobtained by the arrangement, that the overflow for the liquid beingfitted in form of an intermediate partition into the separating chamberand that the front wall of the separating chamber is perforated at itsbottom.

The impurities can then not deposit at the lower perforated end of thewall opposite to the current of the liquid, thus in the leaching chamberitself, because they are washed by the correspondingly higherhydrostatic pressure through the holes into the separating chamber. Theywill therefore deposit in the separating chamber itself atthefoot of.the partition damming up the liquid and may be thence removed atintervals or be washed downward by means of gates operated from outside.

In the accompanying drawing the present invention is exemplified in aconstructional form.

Figure 1 is a longitudinal section along the middle of the apparatus.Fig. 2 is an enlarged view of a part of Fig. 1. Fig. 3 is a side view ofFig. 2.

The difiusion or leaching apparatus consists of a semi-circular inclinedtrough a, which is divided by partitions b, 0, leaving a part of itssection free, into a number of leaching chambers d and separatingchambers 6.

With the older apparatus the partitions Z) and 0 meet directly in formof a roof or coping, and the partitions 0 are perforated in their upperpart only at h. The lower, non-perforated part serves to dam in theliquid in the next following higherfcham- I ber, so'that the overflowfor the liquid to the next lower chamber was formed by the upper edge ofthe of the partitions 0, whereby the hereinbefore stated diflicultieswere caused.

According to the present invention the partitions b and 0 are covered bya roof w sloping. toward the upper end of the apparatus, which issituated beneath the driving shaft 7 f extending throughout the entirelength of the trough. Thewalls c. areperforated along their wholeheight, thus not only at the top at h but also below at 1' (Fig; 2),whereas the walls I) are only perforated at their bottom at g. Betweenthe walls bf and 0 intermediate partitions s are provided, which have attheir lower end cleaning doors t, which are generally closed by gates u.The lattermay be opened from any suitable point and by any suitablemeans and at given intervals, so as to allow of the impurities, sand andthe like, which have deposited. in front of them in the antichambersbeing washed away. 7 V

As in the apparatus forming the subject matter of the principalapplication the slices which are supplied to the lower end of the trougha are conveyed upward into the several chambers d in the direction ofthe arrows v by means of the conveyerarms 7c fitted to the shaft f andhaving a suitable pitch. For greater-simplicity in the drawing thesearms have only been shown in the lefthand end of Fig l. By means ofblades Z which .are considerably wider than the arms 70, and which. arelikewise-only shown in the left hand end of Fig, 1, theslicesare thrownover the roofs w intothe' next cham-' ber cl. Therethey are met byv theleaching. liquid juice or water, which is supplied to the upper end ofthe trougha. This juice flows in the direction of the arrows theanti-chambers 1 is theredammed in by a the partitions s and flows overthese into, the separatingjchambers e, escaping at the lowerend of saidchambers eithrough perform tions'g in walls Z) into the next lowerchamher, and soon, traveling not only longitu dinallyto the'troughthrough themass of slices in the chamber but also diagonally from downup, and being completelyseparated within the separating chambers e fromthe slices which are thrown over the latter. The leached slices areremoved by a suitable conveyer from the last chamber 01 at the righthand end of the trough into the tube 0,-whence they are further conveyedby a conveyer communicating therewith.-,

The juice recovered runs ofl at the lower end of the trough and is takento its further treatment. 7 V

As will be evident from the foregoing description the overflow for theslicesformed non-perforated lower part chambers chambers, a roof aboveand connected with.

. ing chambers anda fiow for the liquid formed by the upper edge a ofthe walls '8, and both are separated by the roof 00, so that thecurrents flowing in opposite directions cannot disturb each other at theoverflow. The impurities, sand and the like will deposit at the foot ofthe walls s'in the anti-chambersy without being able to choke theperforations atr, so that there is no danger of" their being-againmixedwith the slices agitated by the arms, and carried upwardwith them,what always was to befeared, when the deposit of the'impuri- 1. In aleaching apparatus of the kind described, a trough, .walls dividingsaid:

trough into arplurality of leaching chambers and intermediate separatingchambers, and roofs extending from one wall toanother, abovesaid'in'termediate separating chambers.

V tieslay within the leaching'chambers of the apparatus in which theagitators worln; The.

2. In a leachingapparatus of the kind described,'an inclined trough,walls divide ing said trough into a'plurality of leaching chambers andintermediate separating chamhers, and inclined roofs extending from.one.

wall to another, incl osing said separating i chambers. a v I U 3. In aleaching. apparatus of the kind described, a trough, pairs of wallsdividing said trough into a'plurality of leaching, and intermediateseparating each pair of'walls, and a partition'located between each pairof walls and terminating.

5'. In a leaching pp a us. of the 1 described, a trough, a plurality ofwalls perforated at 'their lowerporti'ons and disposed in' pairstodivide said 'trough into successive leaching'bhambers inclined roofsaboversaid pairs of walls, and intermediate partitions in said chamberslocated beneath said roofs'providing a passage and forming with saidpartitions a plurality of s'eparat plur'ali-tyof; dirt deposit chambers.

6. 'In' a leaching apparatus of the kind described, atrough, and aplurality of comi bined separating and dirt deposit chambers said,trough" into a plura'lity of leaching chambers.

, covered by a common inclined roof dividing- 7. In a leaching apparatusof the kind described, a trough, a plurality of pairs of walls dividingsaid trough into a plurality of leaching chambers, a roof for each pairof walls overlying intermediate partitions which have openings therein,and means for controlling the openings in said partitions.

8. In a leaching apparatus of the kind described, the combination with aplurality of leaching chambers, of separating chambers alternating withsaid leaching chambers, and an inclined roof covering each of saidseparating chambers.

9. In a leaching apparatus of the kind described, a trough, a pluralityof Walls and roofs forming separating chambers and dividing said troughinto a plurality of leaching chambers, some of said Walls forming inletsto admit liquid to the upper part of the separating chambers and othershaving outlets to discharge it at the lower part of said chambers.

10. In a leaching apparatus of the kind described, a trough, a pluralityof pairs of walls forming part of separating chambers dividing saidtrough into a plurality of leaching chambers, and inclined roofscovering the separating chambers.

11. In a leaching apparatus of the kind described, the combination witha plurality of leaching chambers, of Walls forming separating chambers,and partitions forming dirt deposit chambers, the walls of the dirt MAXPASOHEN. Witnesses:

WOLDEMAR HAUPT, HENRY HASPER.

Copies 01' this patent may be obtained for the cents each, by addressingthe "Commissioner of Patents Wsshington, D. 0.

